删除旧版本
sudo yum remove git*
添加repo并安装
sudo yum -y install https://centos7.iuscommunity.org/ius-release.rpm sudo yum -y install git2u-all
搬运from
https://computingforgeeks.com/how-to-install-latest-version-of-git-git-2-x-on-centos-7/